Some stay for a while, standing quietly, while others on their morning walk pause before moving on again.
The witness told the Herald he did not hear the shouting or screams that pierced the air only a few minutes later, as he was not wearing his hearing aid.
It was only when family members from another part of the house walked in and saw what was happening outside. The man immediately ran out to help.
As he and other members of the public worked to help her, he suddenly had a flashback to just a few minutes before, he said, when he had seen her at the bus stop.
Police investigating the incident are appealing to anyone who was driving in the Westgate Drive and Royal Rd area yesterday morning - between about 7.45am and 8.45am - who may have dash-cam footage to come forward.
Can you help? Contact Police on 105 or anonymously on Crimestoppers: 0800 555 111.